Explosive material composition and method for preparing the same

• US 20050189049A1
• Filed: 11/01/2004
• Published: 09/01/2005
• Est. Priority Date: 11/04/2003
• Status: Active Grant

• Current Assignee: NOF Corporation
• Original Assignee: NOF Corporation
• Inventors: Serizawa, Kazuya, Ohno, Yoshio, Takahashi, Katsuhiko
• Granted Patent: US 7,645,351 B2
• Time in Patent Office: Days
• US Class Current: 149/2
• CPC Class Codes: C06B 31/30 with vegetable matter; with resin; with rubber
• CPC Class Codes: C06B 47/145 Water in oil emulsion type explosives in which a carbonaceous fuel forms the continuous phase

Abstract

An explosive material composition containing, as an active ingredient, particles of a water-soluble reactive ingredient having an uniform particle size. Each particle is coated with an oil ingredient and/or a thickener. The coated particles form an agglomerate.

Claims

1. An explosive material composition for an explosive, the composition comprising:

a dried substance prepared by drying a water-in-oil emulsion containing a water-soluble solid reactive ingredient as an active ingredient of the explosive, an oil ingredient, and a thickener, wherein the dried substance includes an agglomerate formed by particles of the water-soluble solid reactive ingredient, each particle being coated with at least one of the oil ingredient and the thickener.

2. The explosive material composition according to claim 1, which is molded into a predetermined shape.

3. The explosive material composition according to claim 1, wherein the dried substance has a water content of less than 2 mass %.

4. The explosive material composition according to claim 1, wherein the water-soluble reactive ingredient is at least one selected from the group consisting of an oxidizing agent and a fuel which burns when oxidized.

5. The explosive material composition according to claim 4, wherein the oxidizing agent is at least one selected from the group consisting of:

nitrates, nitrites and oxohalogens of any one of alkali metals, alkaline earth metals and ammonium; and

basic nitrates.

6. The explosive material composition according to claim 4, wherein the oxidizing agent is at least one selected from the group consisting of ammonium nitrate, sodium nitrate and ammonium perchlorate.

7. The explosive material composition according to claim 1, wherein the thickener is at least one selected from the group consisting of cellulose derivatives, polyvinyl compounds, polyalkylene glycols and polysaccharides.

8. The explosive material composition according to claim 1, wherein the oil ingredient includes an oil and a surfactant which allows droplets of an aqueous solution of the water-soluble reactive ingredient to disperse in the oil.

9. The explosive material composition according to claim 1, wherein the ratio of the mass of the water-soluble reactive ingredient to the total mass of the thickener and the oil ingredient is 50:

50 to 98;

2.

10. The explosive material composition according to claim 1, wherein the explosive burns without detonation and generates gas or heat.

11. An explosive material composition for an explosive, the composition comprising:

a particle of a water-soluble reactive ingredient as an active ingredient of the explosive;

an oil ingredient; and

a thickener, wherein each particle of the reactive ingredient is coated with at least one selected from the oil ingredient and the thickener, and wherein the coated particles form an agglomerate.

12. The explosive material composition according to claim 11, wherein the average diameter of the particle of the water-soluble reactive ingredient is 0.5 to 5 μ

m.

13. An explosive grain comprising:

an agglomerate of particles, wherein each particle includes;

a core of a water-soluble reactive ingredient as an active ingredient of the explosive; and

a coating film coating the core, the coating film containing at least one selected from an oil ingredient and a thickener.

14. The explosive grain according to claim 13, wherein the average diameter of the core of the water-soluble reactive ingredient is 0.5 to 5 μ

m.

15. The explosive grain according to claim 13, wherein the ratio of the mass of the water-soluble reactive ingredient to the total mass of the thickener and the oil ingredient is 50:

50 to 98;

2.

16. The explosive grain according to claim 13, wherein the coating film has micropores.

17. A method for preparing a material composition for an explosive, the method comprising:

preparing an aqueous solution of a water soluble solid reactive ingredient;

mixing the aqueous solution with an oil ingredient and a thickener to form a water-in-oil emulsion; and

drying the emulsion.

18. The method according to claim 17, wherein the water-in-oil emulsion has a water content of 10 to 20 mass %.

19. The method according to claim 17, wherein said drying includes heating, depressuring, or a combination of heating and depressuring.

20. The method according to claim 17, wherein said preparing the water-in-oil emulsion is conducted with heating.

21. The method according to claim 17, wherein said drying the emulsion includes forming solid particles of the water soluble solid reactive ingredient coated with the oil ingredient and the thickener.